isbn-sort/isbn_sort/__init__.py

from flask import Flask, redirect, g
import secrets

from .app import bp as app_bp

app = Flask(__name__)

app.config["DATABASE"] = "data/books.sqlite"
app.config["SECRET_KEY"] = secrets.token_hex()

app.register_blueprint(app_bp)

@app.route("/<path>")
def handle_redirect(path):
    if not path.startswith("/app"):
        return redirect("/app"+path, 301)
    abort(404)

@app.after_request
def after_request(response):
    """Automatically close db after each request"""
    if ('db' in g) and (g.db is not None):
        g.db.close()
    return response